How does grass seed contamination occur?
Grass seeds penetrate the wool or skin of the lamb or sheep when it grazes, pushes through grass or when it lies down. The worst times of the year for seed contamination are spring and summer.
A range of grasses produce seeds which cause problems and these include
- spear
- corkscrew
- brome
- barley
- silver grass
- needle grass.
![grazing](images/section1_2_sm.jpg)
Sheep grazing on pasture - Click to enlarge photo